cascade reaction involving oxidative dearomatization/semipinacol rearrangement of indol‐2‐yl cyclobutanols is explored with N‐sulfonyloxaziridine (Davis oxaziridines) as oxidant, generating various 2‐spiroquaternary 3‐oxindoles in modest to good yields. This method might be useful in the synthesis of indole‐based alkaloids bearing 2‐spiroquaternary carbon centers. PTS=p‐toluenesulfonic acid monohydrate
A Concise Asymmetric Total Synthesis of Aspidophytine
作者:K. C. Nicolaou、Stephen M. Dalby、Utpal Majumder
DOI:10.1021/ja806176w
日期:2008.11.12
An expedient asymmetric total synthesis of aspidophytine is reported. A highly convergent strategy involving the sequential annulation of vinyl iodide 5 with indole 6 exploits varying modes of indole reactivity to provide aspidophytine in 23% over six steps from 5.